Advertising sign



FIG. 1 is a perspective view of a advertising sign in accordance withour new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing further details of the advertising sign are forillustrative purposes only and form no part of the claimed design.

The ornamental design for the advertising sign, as shown and described.